/**
 * Copyright (C) 2010-2013 Leon Blakey <lord.quackstar at gmail.com>
 *
 * This file is part of PircBotX.
 *
 * PircBotX is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PircBotX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with PircBotX. If not, see <http://www.gnu.org/licenses/>.
 */
package org.pircbotx.dcc;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.SocketChannel;
import lombok.Cleanup;
import org.pircbotx.Configuration;
import org.pircbotx.User;

/**
 * A DCC File Transfer initiated by the bot
 * @author Leon Blakey <lord.quackstar at gmail.com>
 */
public class SendFileTransfer extends FileTransfer {
	public SendFileTransfer(Configuration configuration, SocketChannel socket, User user, File file, long startPosition) {
		super(configuration, socket, user, file, startPosition);
	}

	@Override
	protected void transferFile() throws IOException {
		@Cleanup
		FileInputStream fileInput = new FileInputStream(file);
		FileChannel fileChannel = fileInput.getChannel();
		fileChannel.position(startPosition);

		ByteBuffer buffer = ByteBuffer.allocate(configuration.getDccTransferBufferSize());
		int bytesRead;
		while ((bytesRead = fileChannel.read(buffer)) != -1) {
			socket.write(buffer);
			bytesTransfered += bytesRead;
		}
	}
}
